The writer invented the first successful photoengraving process for printing.

His father, a photoengraver and inventor whose formal schooling had ended with fourth grade, held patents on several photoengraving devices.

The errant photoengraving, kept in a picture editor’s desk, was reused again and again.

The earlier of the two volumes consists of 488 pages explaining the craft of photoengraving, and it reproduces every conceivable example of the technique offered by the technology then available.

Blocks produced by the photoengraving and other mechanical processes.